Citing sources close to the matter, 9to5Mac says Apple is expected to unveil a new Apple Watch and a new iPhone 6c at the event.

The new version of the Apple Watch — the Apple Watch 2 — is expected to come with a camera for video chatting, among other additions, according to 9to5Mac's Mark Gurman, who earlier this year said he had spoken with sources familiar with Apple's plans for the next watch.

It's not yet clear if these new features are what's being announced at the March 2016 event.

Certain models sold out only hours after preorders officially started, leading some orders to be delayed by weeks. The Apple Watch officially launched in April 2015.

The iPhone 6c is rumored to be a phone with a 4-inch screen. Earlier this year, analysts at Jeffries predicted that Apple would unveil this new product in the first quarter of 2016. Typically, though, Apple introduces its new iPhones in September. And, although it follows the 'C' naming convention introduced with the iPhone 5C, Jefferies believes this iPhone 6C will have a metal casing instead of the colorful plastic found on the iPhone 5C.